Visible container



June 1, 1937. E. F. KUEFFNER VISIBLE CONTAINER Filed May 8, 1935 Patented June 7 1-, 1937 UNITED STATES PATENT OFFICE 2 Claims.

7 This invention refers to containers and more particularly to those that are made of transparent material of a non-vitreous nature for containing liquid or fluid products. It has 5 among its objects to provide a container that may be closed hermetically in a conventional type of canning. machine; that is capable of having a conventional metal cover, that will be strong and substantial although made, of relatively thin material; that maybe made from sheet cellulosic material; that will be enabled to provide for the forming and lengthening of the materialin the containers to permit them to adapt themselves more intimately to the requirements of rolling-in the tops at the time of closure. Other objects will become apparent as the invention is more fully set forth. 7

In the use of cellulosic material such as cellulosic acetate for containers, particularly where intended to be used for liquid or fluid products, diiilculty isexperienced in providing for a closure that will be air and liquid tight, and capable of 30 through inability to make hem tight and leak proof. In this invention, .he tops or closures are provided for both ends and are of metal of conventional form, and are attached to the body of cellulosic sheet material such as cellulosic 35 acetate by rolling both together in the conventional attachment used in closing cans, a cement or solving material being used to lubricate and soften the material in the tops or-body as the case may be. The solvent action in softening 40 the top or ends of the body enables the cellulosic material such as cellulosic acetate of the container to be readily rolled and formed to suit the dies and the joint required. The cement in the process 'of rolling loses its volatile constituents and allows the surfaces to come closer together. The cellulosic material such as cellulosic acetate is so softened that it avoids the difficulties of tearing, breaking and cracking which is met with when cellulosic material such 50 as cellulosic acetate without the cement or solvent is used and bent to a roll or joint. The use of the solvent or cement enables all fillets, crevices and depressions in the metallic or more rigid metallic parts to be filled and made quasi- 5 homogeneous. It also removes the-oily scale or film that is left on the metal caps in manufacturing so that the connection is positively intimate, and the adherence between the cellulosic and metallic parts more secure.

In the drawing which illustrates by way of 5 example an embodiment of this invention:-

Figure l is an elevation, with portions broken away, of a container embodying this invention.

Figure 2 is an enlarged detail of the joint used v in Figure l. 10

Figure 3is an elevation of a modified form of the container.

Figure 4 is an enlarged detail of the joint used in Figure 3.

Similar reference characters refer to similar 15 parts throughout the drawing.

In the construction shown I represents a container body of thin sheet transparent cellulosicv material such as cellulosic acetate bent into a cylindrical form and an overlapping seam 2. 20 The end portions 3 and 4 of the body are straight normally, and the bottom metallic cap 5 applied on after the seam is'sealed together, preferably with a suitable cellulosic cement. The cap is applied by placing the body in a canning machine of conventional type and the peripherial edge surface ll of the cap turned with the end portion I into a rolled joint as indicated at 6 in Figure. 1 and Figure 2. In forming the joint, a film of cement I- is placed on portion of the can to be connected with the end portion of the body, so that a full surface contact is made on the end portion of the body before or during the process of rolling the joint. In contact with the end portion 4, the cement acts as a solvent to soften the cellulosic material such as cellulosic acetate, and as a lubricant to form the joint readily in the machine used for the-purpose. The completion of the joint brings frictional and other actions into play and causes the volatile constituents in the cement to pass off into the atmosphere; brings the cement into all the crevices and fillets and spread over all contacting surfaces, and completes the work of sealing and sticking the parts together.

The products are then placed in the container, and the latter is brought again into line with the canning machine, where the top metallic cap 8 has cement applied to its peripherial edge surface l8, and brought into the rolling-on process '60 of the machine. When this process is brought into action, the metallic cap-has its peripherial edge portion turned over with the end portion iof the body to form a rolled-on joint as indicated in Figure 2. The pement l in this case strengthens the container throughout.

metal of the cap to flow smoothly and bend into the joint without undue strains appearing. At the same time, the cellulosic body end portions are softened sufficiently to bend into the joints and mold into all the crevices in between, and glue both the body and cap together. This not only seals all places where a leak might be looked for but also looks the surfaces with a surface tension that is additional to the mechanical tie-up. The caps are-now on both ends of the container. In making the scroll shown in the section in Figure 2, the cap peripherial surface is bent into the helical form indicated with the edge 9 positioned as indicated, while the body has its end portion bent similarly in a scroll form to cooperate with that of the cap, with its edge positioned at In as indicated.- The cement-I is spread in between and closes the joints at H so as to seal all possible places where a leakage might otherwise occur.

The more central portion l2 of the cap is bent to depend down on the inner surface so as to clamp the end portion with more substantial attachment than if limited to the extreme orifice portion of the body. This feature is indicated at l3 where the cap and body are shown in contact substantially aligned with the surface contact of the outside portion of scroll. This not only affords a better closure but also In receiving rough treatment, such as by falling to the ground from a height, the container will take up the strains caused, even if out of shape, in such a way as to prevent leakage. Under similar conditions, other containers have been unable to stand up and prevent leakage. The straining of the mechanical lock of the joint is not sufficient to break the seal, but it is also necessary to detach, break or remove the cement, which cannot be done, because of its position in the lock, and the inherent elasticity of the materials in the cement and body.

The type of joint used in Figures 3 and 4 is clearly indicated in the drawing, the cap being brought down to the level l3 on the more central portion, and the outer edge l4 aligned with it, to provide a substantial embracing clamp for the end portion of the body. The end portion 24 is bent outwardly on to itself to provide a beaded ring as indicated, with the peripherial portion of the cap surrounding the same. The cement l is used on the contact surfaces for lubricating the process and cementing the parts at this point together. a

The cement used is based on amyl-acetate or similar nature, tending to combine and act as solvent on the cellulosic material such as cellulosic acetate making up the body, as well as pronot discolor the cellulosic material.

H 2,082,701 lubricates the action of the process enabling the viding the adhesive surface tension between surfaces that are brought in contact therewith, which in this case would be on the caps. It will This ce- ,ment preferably consists of Pontianak gum dissolved in alcohol, with a very little lithopone powder added, and whiting powder suflicient to tone the mixture, to the above is added a small proportion of amyl-acetate to assist in softening the cellulosic mat material of the container. This makes a transparent cement suitable for the container 'material.

While but two forms of the invention are shown in the drawings, it is not desired to limit this application for patent to these particular forms, or in any other way, otherwise than limited by the prior art as it is appreciated that other forms of construction could be used that would employ the same principles and come'withln the scope of the appended claims.

Having thus described the invention, what is claimed is:-

1. A container comprising a cylindrical body composed of transparent unmolded semi-flexible material with the top and bottom open-ended,

and to form a double-sided clamp thereon and a cement for softening said material and for I lubricating the crimping and sealing of the same disposed on the surfaces of the caps and body portions contacting closely together. 7

2. A container of the class described comprising a body proper of tubular form with the top and bottom portions open-ended, said body being formed of transparent flexible cellulosic material, metallic caps for both ends adapted to be rolled cold onto said top and bottomportions into double-rolls having helical sections with the metal clamping the said portions on both sides thereof for an approximate similar alignment, the more central portions of the caps being depressed against the inner walls of the body to brace same against inwardly collapsing movement and to tighten the roll on said portions, and cement means having an amyl-acetate base for softening said upper and lower portions and disposed on the surfaces of the metallic caps and the top and bottom portions of the body which are rolled about each other, as aforesaid, for softening the cellulosic material, making it sticky or glutinous, and lubricating the caps for rolling together without tearing or cracking the said caps, top, and bottom portions, and forming an air tight and complete seal therebetween.

EMIL F. KUEFFNER. 

